37961997 has 4 divisors (see below), whose sum is σ = 50616000. Its totient is φ = 25307996.

The previous prime is 37961977. The next prime is 37962007. The reversal of 37961997 is 79916973.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 37961997 - 2⁶ = 37961933 is a prime.

It is a super-2 number, since 2×37961997² = 2882226432456018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (37961977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6326997 + ... + 6327002.

It is an arithmetic number, because the mean of its divisors is an integer number (12654000).

Almost surely, 2^37961997 is an apocalyptic number.

It is an amenable number.

37961997 is a deficient number, since it is larger than the sum of its proper divisors (12654003).

37961997 is a wasteful number, since it uses less digits than its factorization.

37961997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12654002.

The product of its digits is 642978, while the sum is 51.

The square root of 37961997 is about 6161.3307815763. The cubic root of 37961997 is about 336.0854286037.

The spelling of 37961997 in words is "thirty-seven million, nine hundred sixty-one thousand, nine hundred ninety-seven".