1357097690 has 32 divisors (see below), whose sum is σ = 2632346640. Its totient is φ = 500765184.

The previous prime is 1357097689. The next prime is 1357097723. The reversal of 1357097690 is 967907531.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 724524889 + 632572801 = 26917^2 + 25151^2 .

It is a super-2 number, since 2×1357097690² = 3683428280406672200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 338216 + ... + 342204.

Almost surely, 2^1357097690 is an apocalyptic number.

1357097690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1357097690 is a deficient number, since it is larger than the sum of its proper divisors (1275248950).

1357097690 is a wasteful number, since it uses less digits than its factorization.

1357097690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6626.

The product of its (nonzero) digits is 357210, while the sum is 47.

The square root of 1357097690 is about 36838.8068482137. The cubic root of 1357097690 is about 1107.1429623269.

The spelling of 1357097690 in words is "one billion, three hundred fifty-seven million, ninety-seven thousand, six hundred ninety".