961681357 has 16 divisors (see below), whose sum is σ = 1190714112. Its totient is φ = 756322560.

The previous prime is 961681327. The next prime is 961681387. The reversal of 961681357 is 753186169.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (961681327) and next prime (961681387).

It is not a de Polignac number, because 961681357 - 2¹⁹ = 961157069 is a prime.

It is a super-2 number, since 2×961681357² = 1849662064802722898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961681327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16444 + ... + 46837.

It is an arithmetic number, because the mean of its divisors is an integer number (74419632).

Almost surely, 2^961681357 is an apocalyptic number.

It is an amenable number.

961681357 is a deficient number, since it is larger than the sum of its proper divisors (229032755).

961681357 is a wasteful number, since it uses less digits than its factorization.

961681357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63468.

The product of its digits is 272160, while the sum is 46.

The square root of 961681357 is about 31010.9876817879. The cubic root of 961681357 is about 987.0604081341.

The spelling of 961681357 in words is "nine hundred sixty-one million, six hundred eighty-one thousand, three hundred fifty-seven".