62640397 has 4 divisors (see below), whose sum is σ = 65937280. Its totient is φ = 59343516.

The previous prime is 62640353. The next prime is 62640407. The reversal of 62640397 is 79304626.

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 62640397 - 2⁷ = 62640269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (62640317) 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, 1648413 + ... + 1648450.

It is an arithmetic number, because the mean of its divisors is an integer number (16484320).

Almost surely, 2^62640397 is an apocalyptic number.

It is an amenable number.

62640397 is a deficient number, since it is larger than the sum of its proper divisors (3296883).

62640397 is a wasteful number, since it uses less digits than its factorization.

62640397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3296882.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 62640397 is about 7914.5686553343. The cubic root of 62640397 is about 397.1471958916.

The spelling of 62640397 in words is "sixty-two million, six hundred forty thousand, three hundred ninety-seven".